OPs can delete links for a brief time after submission. Mods will sometimes change links to a better source of the story. Also the auto-mod system will mark cer

OPs can delete links for a brief time after submission. Mods will sometimes change links to a better source of the story. Also the auto-mod system will mark certain links "dead" based on various signals. It could have also been linked in a comment (I suspect that's the case here).